deprecated - Ember.js 2.0 - modifying property twice in a single render deprecation warning -

i'm developing application current ember 2.0 beta release (beta 1), , have started see deprecation warning:

you modified xxx twice in single render. unreliable in ember 1.x , removed in ember 2.0

it looks offenders computed properties being recalculated multiple times because dependent key(s) being updated multiple times in single run loop. stack traces deprecations don't lead of application code, , thought ember should silently taking care of me anyway.

is need actively fix in app code before updating v2.0 final when released, or more of 'internal' deprecation notice? if need make changes, there common anti-patterns or gotchas should out cause error?

in case missed it, should fixed in master: https://github.com/emberjs/ember.js/issues/11519